What was the ruling family name in 19th century Europe?

There were many ruling family names in 19th century Europe. Some of the most notable include:

* The Habsburgs, who ruled over the Austrian Empire and its various territories.

* The Romanovs, who ruled over the Russian Empire.

* The Hohenzollerns, who ruled over the Kingdom of Prussia and later the German Empire.

* The Bourbons, who ruled over France and Spain.

* The Saxe-Coburg and Gothas, who ruled over the United Kingdom and Belgium.

* The Bernadottes, who ruled over Sweden and Norway.

* The Nassau-Weilburgs, who ruled over the Netherlands and Luxembourg.

* The Savoy, who ruled over the Kingdom of Sardinia and later Italy.

* The Wittelsbachs, who ruled over the Kingdom of Bavaria.

* The Württembergs, who ruled over the Kingdom of Württemberg.